JP2022136908A - Bending device of steel plate and bending method of steel plate - Google Patents

Abstract

To solve the problem in which: variation of process tolerance is suppressed regardless of an operator to manufacture a product having uniformity of quality.SOLUTION: A bending device (100) of a steel plate comprises: a first roller (1) which contacts with one surface of the steel plate (P); a second roller (2) which contacts with the other surface of the steel plate and reciprocally moves in a direction of approaching and leaving from the first roller; and an operation part (3) which adjusts moving amount of the second roller according to rotation amount. The operation part has a reference mark (4) to be positioned with a reference position where bending process is started by the second roller.SELECTED DRAWING: Figure 2

Description

The present invention relates to a steel plate bending apparatus and a steel plate bending method for bending a steel plate such as a guardrail beam.

2. Description of the Related Art Conventionally, a bending apparatus for bending a steel plate or a steel pipe is known (see, for example, Patent Document 1). For example, a steel pipe bending apparatus bends the steel pipe by pressing. A steel pipe is supported on a die, and the middle of the steel pipe is pressed by a punch to locally bend and move the steel pipe in the axial direction. Then, the required length is bent by bending in the same manner.
Here, the degree of pressurization by the punch is often determined by the sense of a skilled worker.

JP 2005-279745 A

However, depending on the sense of the operator, it is difficult to manufacture products with uniform quality because the accuracy of bending varies from operator to operator. In addition, if the operator's skill level is insufficient, it will be necessary to perform repair work after bending and inspection after repair work, resulting in a decrease in product productivity.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a technology that can suppress variations in processing accuracy and manufacture products having uniform quality regardless of the operator. do.

In order to solve the above problems, an aspect according to the present invention is a steel plate bending apparatus, comprising: a first roller that contacts one surface of a steel plate; a second roller reciprocatingly movable in directions approaching and separating from the first roller; and an operation unit adjusting a movement amount of the second roller according to a rotation amount, is characterized by comprising a reference mark for aligning the second roller with a reference position for starting bending.

Further, it is preferable that a guide section is provided which is fixed independently of the operation section and indicates the position of the reference mark when the second roller is aligned with the reference position.

Moreover, it is preferable that a housing part that accommodates the first roller and the second roller is provided, and the guide part is fixed to the housing part.

Moreover, it is preferable that the operation section includes at least one process mark provided at every predetermined rotation amount along the rotation direction from the reference mark.

Further, the operation unit may include a plurality of the reference marks, and may include at least one process mark provided for each reference mark and provided for each rotation amount different from each other along the rotation direction. preferable.

In order to solve the above problems, an aspect according to the present invention is a steel plate bending method using the steel plate bending apparatus described above, wherein the operation portion is rotated to move the reference mark to a predetermined position. a reference positioning step of aligning the second roller with a reference position for starting bending; and a bending step of bending the steel plate by passing the steel plate between the first roller and the second roller. , is characterized by having

In order to solve the above problems, an aspect according to the present invention is a steel plate bending method using the steel plate bending apparatus described above, wherein the operation portion is rotated to move the reference mark to a predetermined position. a reference positioning step of aligning the second roller with a reference position for starting bending; and a bending step of bending the steel plate by passing the steel plate between the first roller and the second roller. a process alignment step of moving the process mark to the predetermined position after the bending step; and bending the steel plate through the steel plate between the first roller and the second roller after the process alignment step. and a second bending step, wherein the process alignment step and the second bending step are performed at least once.

ADVANTAGE OF THE INVENTION According to the aspect which concerns on this invention, the dispersion|variation in a process precision can be suppressed and the product which has uniform quality can be manufactured regardless of an operator.

1 is a perspective view of a steel plate bending apparatus; FIG. It is a figure explaining the mechanism of bending by a bending apparatus of a steel plate. (a) is a diagram for explaining the state of the operation unit when the second roller is aligned with the reference position, and (b) is a diagram for explaining the bending of the steel plate performed in the state of (a). . (a) is a diagram for explaining the state of the operation unit when the second roller is positioned from the reference position to the second bending position, and (b) is a diagram for bending the steel plate performed in the state of (a) It is a figure explaining processing. (a) is a diagram for explaining the state of the operating portion when the second roller is positioned from the second bending position to the third bending position; It is a figure explaining the bending process of the steel plate which is cut. (a) is a diagram for explaining the state of the operating portion when the second roller is positioned from the third bending position to the fourth bending position; It is a figure explaining the bending process of the steel plate which is cut.

Preferred embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiment shown below is an example, and various embodiments can be made within the scope of the present invention.

<Structure of Steel Plate Bending Device>
As shown in FIGS. 1 to 3, a steel plate bending apparatus (hereinafter referred to as a bending apparatus) 100 bends a straight beam to form a curved guardrail beam, for example. .
The bending device 100 includes a first roller 1 , a second roller 2 , an operation section 3 , a guide section 6 and a housing section 7 .

The first roller 1 contacts one surface (lower surface side) of the conveyed steel plate (beam) P, sandwiches the steel plate P with the second roller 2, and bends the steel plate. The first roller 1 is accommodated in the housing portion 7 and fixed in position. Two first rollers 1 are provided along the conveying direction of the steel plate P, and are rotatable about their axes by a drive unit such as a motor.

The second roller 2 contacts the other surface (upper surface side) of the conveyed steel plate (beam) P, sandwiches the steel plate P with the first roller 1, and bends the steel plate. The second roller 2 is accommodated in the housing portion 7 and is provided so as to be reciprocally movable in directions approaching and separating from the first roller 1 . Specifically, the second roller 2 is provided between the two first rollers 1 so as to approach and separate from above the first roller 1 . The second roller 2 is provided above the first roller 1, and is rotatable about its axis by a drive unit such as a motor. The second roller 2 is reciprocated in directions approaching and separating from the first roller 1 by operating the operation portion 3 .

The operation unit 3 is composed of, for example, a handle that rotates around an axis. The operating portion 3 is rotatably screwed to a shaft portion 8 extending in a direction toward and away from the first roller 1, that is, in a vertical direction. By rotating the operating part 3 in one direction (clockwise), the operating part 3 is lowered together with the second roller 2 so as to approach the first roller 1, and by rotating in the other direction (counterclockwise), , rises away from the first roller 1 together with the second roller 2 . Therefore, the operation unit 3 can adjust the amount of movement (the amount of vertical movement) of the second roller 2 according to the amount of rotation.

The operation unit 3 includes a reference mark 4 and a process mark 5. As shown in FIG.
The reference mark 4 is used when aligning the second roller 2 with a reference position at which bending of the steel sheet P is started. The reference mark 4 is formed integrally with the grip portion 3 a of the operation portion 3 and provided on the surface of the cylindrical portion 3 b that shares the rotational axis of the operation portion 3 .
The reference mark 4 is, for example, a linear mark marked on the surface of the cylindrical portion 3b along the rotation axis direction. The reference mark 4 is given a color different from that of the surface of the cylindrical portion 3b so as to be easily visible.
A plurality of reference marks 4 are provided on the cylindrical portion 3b. Each of the reference marks 4a and 4b is arranged along the axial direction of the cylindrical portion 3b, and the position to be provided differs depending on the curvature of the steel plate P to be finally obtained.

The process mark 5 is used when aligning the second roller 2 to a position where the second and subsequent bending processes are performed when the steel sheet P is bent a plurality of times. The process mark 5 is provided on the surface of the cylindrical portion 3b.
The process mark 5 is, for example, a linear mark marked on the surface of the cylindrical portion 3b along the rotation axis direction. The process mark 5 is given a color different from that of the surface of the tubular portion 3b so as to be easily visible. Here, when there are a plurality of process marks 5, each process mark 5 has a horizontal line that intersects the linear mark, and the number of horizontal lines differs from one process mark 5 to another.
A plurality of process marks 5 are provided on the cylindrical portion 3b corresponding to each reference mark 4. As shown in FIG. Each process mark 5 is provided every predetermined amount of rotation from each corresponding reference mark 4 along the rotation direction of the operation unit 3, and the position ( interval) are different. That is, the process marks 5Aa, 5Ab, . . . corresponding to the reference mark 4a and the process marks 5Ba, 5Bb, .

The guide part 6 is fixed independently of the operation part 3, and indicates the position of the reference mark 4 when the second roller 2 is aligned with the reference position. Further, the guide portion 6 indicates not only the position of the reference mark 4 but also the position of the process mark 5 . The guide portion 6 is formed to have a sharp tip and a base end fixed to the housing portion 7 . By aligning the reference mark 4 and the process mark 5 provided on the operation portion 3 with the leading end portion of the guide portion 6, the second roller 2 can be aligned. That is, when the reference mark 4 and the process mark 5 are aligned with the tip of the guide portion 6, the second roller 2 is at a position where the steel plate P can be bent.

The housing part 7 is a protective case that accommodates at least the first roller 1 and the second roller 2 . A through-hole 7a is formed in the upper surface of the housing portion 7, and the operation portion 3 connected to the second roller 2 protrudes outside the housing portion 7 through the through-hole 7a. A guide portion 6 is fixed near the edge of the through hole 7a.

<Bending method of steel plate>
Next, a method for bending a steel plate using the bending apparatus 100 will be described. In order to obtain a steel plate P with a predetermined curvature, the bending process is divided into several steps and performed step by step. This makes it possible to obtain a stable product with less torsion and residual stress, and to reduce the size of the bending equipment. can do. An example in which the final curvature of the steel plate P is obtained by bending four times will be described below.
When bending the steel plate P, as shown in FIG. 3, the operator grips the grip portion 3a of the operation portion 3 and rotates the operation portion 3 to move the reference mark 4a (4) used for bending. The second roller 2 is moved to a position facing the leading end of the guide portion 6, and aligned with the reference position for starting the bending process.
Next, the steel plate P is passed through the inside of the housing portion 7, that is, between the first roller 1 and the second roller 2, and the steel plate P is subjected to a first bending process.

After performing the first bending process, as shown in FIG. 4, the operator grips the grip portion 3a of the operation portion 3 and rotates the operation portion 3 to form the process mark 5Aa (5) adjacent to the reference mark 4. is moved to a position facing the tip of the guide portion 6, and the second roller 2 is aligned with the position where the second bending process is started.
Next, the steel plate P is passed through the inside of the housing portion 7, that is, between the first roller 1 and the second roller 2, and the steel plate P is subjected to a second bending process. At this time, since the steel plate P has already passed between the first roller 1 and the second roller 2 in the first bending process, the side opposite to the first bending process (on the page of FIG. 4) 2), the steel plate P is passed between the first roller 1 and the second roller 2, and the steel plate P is subjected to the second bending process.

After performing the second bending process, as shown in FIG. 5, the operator grips the grip part 3a of the operation part 3 and rotates the operation part 3 so that the process mark 5Aa used in the second bending process is aligned with the process mark 5Aa. The adjacent process mark 5Ab(5) is moved to a position facing the tip of the guide portion 6, and the second roller 2 is aligned with the position where the third bending process is started.
Next, the steel plate P is passed through the inside of the housing portion 7, that is, between the first roller 1 and the second roller 2, and the steel plate P is subjected to a third bending process. At this time, the steel plate P is passed between the first roller 1 and the second roller 2 from the side opposite to the second bending process (the left side in the paper surface of FIG. 5), and is bent to the steel plate P in the third bending process. Bending process is applied.

After performing the third bending process, as shown in FIG. 6, the operator grips the grip part 3a of the operation part 3, rotates the operation part 3, and moves the process mark 5Ab used in the third bending process. The adjacent process mark 5Ac(5) is moved to a position facing the tip of the guide portion 6, and the second roller 2 is aligned with the position where the fourth bending process is started.
Next, the steel plate P is passed through the inside of the housing portion 7, that is, between the first roller 1 and the second roller 2, and the steel plate P is subjected to a fourth bending process. At this time, the steel plate P is passed between the first roller 1 and the second roller 2 from the side opposite to the third bending (the right side in the paper surface of FIG. 6), and is bent to the steel plate P in the fourth bending. Bending process is applied. With this, the steel sheet P has the curvature to be finally obtained.
The operation portion 3 is rotated to move the reference mark 4b (4) used for bending to a position facing the tip of the guide portion 6, and the second roller 2 is positioned at the reference position for starting bending. By bending together, the steel plate P can be bent with a curvature different from that of the bending described above.

As described above, when bending the steel plate P using the bending apparatus 100, the operator aligns the reference mark 4 with the guide portion 6, and then bends the steel plate P between the first roller 1 and the first roller 1. 2, the steel plate P can be bent with the same curvature regardless of the operator's skill level. Therefore, it is possible to manufacture products (for example, guardrail beams) with uniform quality without depending on the operator's intuition as in the conventional method, and there is no variation in bending accuracy depending on the operator. In addition, even if the operator's skill level is insufficient, there is no need for rework after bending or inspection after rework, and the productivity of the product is not lowered.
Further, when positioning the second roller 2 by the operation section 3, it is only necessary to position the reference mark 4 and the process mark 5 so as to face the leading end of the guide section 6. 2 can be easily performed.
Further, since the guide portion 6 is provided in the housing portion 7, the guide portion 6 can be easily attached.
Further, since the reference mark 4 and the process mark 5 are arranged side by side along the rotation direction of the operation part 3, they can be easily aligned with the guide part 6 only by rotating the operation part 3.例文帳に追加
Further, even when performing a plurality of types of bending, the plurality of reference marks 4 and the process marks 5 corresponding to the respective reference marks 4 are aligned along the axial direction of the operating section 3 (reciprocating direction of the operating section 3). By arranging them side by side, it is possible to flexibly cope with a plurality of types of bending.

<Others>
Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes all aspects included in the concept of the present invention and the scope of claims. Moreover, each configuration may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. Further, for example, the shape, material, arrangement, size, etc. of each component in the above-described embodiment can be appropriately changed according to the specific usage of the present invention.
For example, at least one reference mark 4 is sufficient, and when there are many types of bending, that is, when a plurality of types of bending with different curvatures are performed, reference marks 4 may be provided for each type of bending. good.
Further, if the bending process is performed once, the process mark 5 is not necessary because only the reference mark 4 is sufficient, and a plurality of process marks can be provided according to the number of times of the bending process.
Further, the reference mark 4 and the process mark 5 are not limited to the cylindrical portion 3b, and may be provided at other locations on the operation portion 3 as long as they rotate together with the operation portion 3. FIG.
Moreover, the guide part 6 is not limited to the case where it is newly provided, and a part already provided in the bending apparatus 100, for example, a part of the housing part 7 may be used as the guide part.

1 first roller 2 second roller 3 operation portion 3a grip portion 3b tubular portion 4 reference mark 5 process mark 6 guide portion 7 housing portion 7a through hole 8 shaft portion P steel plate 100 steel plate bending apparatus

Claims (7)

A steel plate bending apparatus,
a first roller in contact with one surface of the steel plate;
a second roller that is in contact with the other surface of the steel plate and is capable of reciprocating in directions approaching and separating from the first roller;
an operation unit that adjusts the amount of movement of the second roller according to the amount of rotation,
The steel plate bending apparatus, wherein the operation unit includes a reference mark for aligning the second roller with a reference position for starting bending. 2. The steel plate according to claim 1, further comprising a guide portion that is fixed independently of the operation portion and indicates the position of the reference mark when aligning the second roller with the reference position. Bending equipment. A housing part that accommodates the first roller and the second roller,
3. The steel plate bending apparatus according to claim 2, wherein the guide portion is fixed to the housing portion. 4. The steel sheet according to any one of claims 1 to 3, wherein the operation unit includes at least one process mark provided at every predetermined rotation amount along the rotation direction from the reference mark. Bending equipment. The operation unit includes a plurality of reference marks,
5. The method according to any one of claims 1 to 4, characterized by comprising at least one process mark provided for each reference mark and provided for different amounts of rotation along the direction of rotation. Steel plate bending equipment. A steel plate bending method using the steel plate bending apparatus according to any one of claims 1 to 5,
a reference positioning step of rotating the operation unit to move the reference mark to a predetermined position and aligning the second roller with a reference position for starting bending;
a bending step of passing the steel plate between the first roller and the second roller;
A method for bending a steel plate, comprising: A steel plate bending method using the steel plate bending apparatus according to claim 4 or 5,
a reference positioning step of rotating the operation unit to move the reference mark to a predetermined position and aligning the second roller with a reference position for starting bending;
a bending step of passing the steel plate between the first roller and the second roller;
a process alignment step of moving the process mark to the predetermined position after the bending step;
a second bending step of bending the steel plate through the steel plate between the first roller and the second roller after the process alignment step;
7. The steel plate bending method according to claim 6, wherein the process alignment step and the second bending step are performed at least once.

Images